Maintenance and Service Guide

Certain typed symbols do not appear correct.
Cause Solution
The font you are using does not support that particular symbol. Use the Character Map to locate and select the appropriate
symbol. You can copy the symbol from the Character Map into a
document.
In Windows 10, type ch in the taskbar search box, and then select
Character Map from the list of applications.
Solving audio problems
If the computer has audio features and you encounter audio problems, see the common causes and solutions
listed in the following table.
Headset microphone connected to the front is not working or is very quiet.
Cause Solution
The front Headset connector supports CTIA (Cellular Telephone
Industries Association) style headsets and not OMTP (Open Mobile
Terminal Platform) style headsets. These dier by the
microphone connections.
Make sure that a CTIA style headset is being used or use an OMTP
style headset with a commercially available adapter that converts
an OMTP headset to the CTIA pinout.
Sound cuts in and out.
Cause Solution
Processor resources are being used by other open applications. Shut down all open processor-intensive applications.
Sound does not come out of the speaker or headphones.
Cause Solution
Software volume control is turned down or muted. Double-click the Speaker icon on the taskbar, then make sure
that Mute is not selected and use the volume slider to adjust the
volume.
Audio is hidden in Computer Setup. Enable the audio in Computer Setup: Security > Device Security.
The external speakers are not turned on. Turn on the external speakers.
The audio device may be connected to the wrong jack. Ensure that the device is connected to the correct jack on the
computer. The rear audio jack output is the green receptacle. The
speakers should be plugged into the line-out jack and the
headphones should be plugged into the headphone jack.
External speakers plugged into the wrong audio jack on a recently
installed sound card.
See the sound card documentation for proper speaker connection.
The rear audio jack output is the green receptacle.
Headphones or devices connected to the line-out connector mute
the internal speaker.
Turn on and use headphones or external speakers, if connected,
or disconnect headphones or external speakers.
Computer is in Sleep state. Press the power button to resume from Sleep state.
58 Chapter 5 Troubleshooting without diagnostics